【单选题】
A <{p}><{br/}><{font _mstmutation="1" _msthash="20489" _msttexthash="16768986"}>境界线色带<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20490" _msttexthash="8814936"}>海岸线<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20491" _msttexthash="14371292"}>远洋航线<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20492" _msttexthash="10089417"}>航空线<{/font}><{br/}><{/p}>
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